Good to know that at least in the U.S, copyright is held by persons, not names, and so pseudonyms are perfectly fine.

A copyright notice, if present, may specify a pseudonym, a business name, or a form of the author's name other than his or her legal name. The validity of the copyright does not depend on the name in the notice. This is true in all Berne Convention countries. [law.stackexchange.com/a/39301]

Unrelated but also learned there's a reason why licenses will screech at you in all caps:

Under US law, disclaimers must be "conspicuous" (UCC 2-316). So you can talk regularly when you're just stating the terms, but if you're disclaiming liability, YOU MUST BE CONSPICUOUS ("to exclude or modify the implied warranty of merchantability or any part of it the language must mention merchantability and in case of a writing must be conspicuous, and to exclude or modify any implied warranty of fitness the exclusion must be by a writing and conspicuous"). [law.stackexchange.com/a/18210]